Hrmm... just saw this thread...
FYI, I'm running MM 350#/in front coilovers on my LX and it's a daily driver. The ride is not what I would call too harsh for the street, even over MI's crappy roads with the Tokico's set on "3". Since I too run a TA/PB rear suspension, my rear spring is a 390-430#/in variable rate.
IMHO, the 275#/in front coilover is too soft for agressive handling on the street, but fine for a street/drag strip car.
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Greg Banish
President,
Detroit Speedworks, Inc.
'93 LX Turbocharged Road Racer
'00 Bad-Ass F150